(a)     A vessel engaged on pilotage duty shall exhibit:

(i)                 at or near the masthead, two all-round lights in a vertical line, the upper being white and the lower red;

(ii)               when underway, in addition, sidelights and a sternlight;

(iii)              when at anchor, in addition to the lights prescribed in subparagraph (i), the light, lights, or shape prescribed in Rule 30 for [vessels at anchor / anchored vessels].

(b)     A pilot vessel when not engaged on pilotage duty shall exhibit the lights or shapes prescribed for a similar vessel of her length.

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